RUI: Geomorphology and Erosion of Extensional Mountain Blocks

小行星9317181 地貌对伸展隆升的响应是地貌学家、沉积学家和地质学家关心的问题，但很少有定量研究。 黄石公园以南地区位于盆地山脉和怀俄明州中落基山脉之间的过渡地带，伸展隆起星罗棋布，表现出不同程度的构造偏移和侵蚀剥离。 将研究其中几个山脉的地貌过程类型和侵蚀速度，以便提供关于在存在主要构造起伏的情况下物质重新分布的新数据。 还将部分根据地形的DEM模型，从地形起伏和流域及河流段的尺寸/特征的角度对实地进行数字描述。 还将根据地貌过程绘制这些山区隆起内的选定地区的地图，并详细研究侵蚀速度。 将利用过去103至104年来在可测定年代的表面上积累的沉积物和河流的切割或加积，对山脉隆起的“竞争”地貌组成部分的过程速率进行量化。 预定研究的沉积物包括洪积湖三角洲、岩屑扇和滑坡坝和冰碛后面的山谷填充物。 如果可能的话，所有这些数据将被一起用来发现剥蚀率的重要预测因子，如地形或流域面积。 地貌过程的概念模型将根据这些数据和过程描述进行评价。 特别令人感兴趣的是流域侵蚀率随时间和偏移量增加而变化。

9317181 Harbor Geomorphic response to extensional uplift is a matter of concern to the geomorphologist, geophysicist, and sedimentologist, but has received little quantitative study. The area south of Yellowstone in the transition between the Basin and Range and Middle Rocky Mountains of Wyoming is dotted by extensional uplifts that exhibit a varying degree of structural offset and erosional dissection. the types of geomorphic processes and rates of erosion in several of these ranges will be studied in order to provide new data on redistribution of mass in the presence of major tectonic relief. The field area will also be numerically described in terms of relief and the dimensions/characteristics of drainage basins and stream segments, in part from DEM models of topography. Selected areas within these mountainous uplifts will also be mapped according to geomorphic process and studied in detail for rate of erosion. Using deposits that have accumulated on datable surfaces and incision or aggradation of streams over the last 103 to 104 years, the rate of processes on "competing" geomorphic components of mountain uplifts will be quantified. Deposits slated for study include pluvial lake deltas, debris fans, and valley fills behind landslide dams and moraines. All of these data will be used together to discover, if possible, the important predictors of denudation rate, such as relief or drainage area. Conceptual models of geomorphic processes will be evaluated against these data and also against descriptions of processes. Of particular interest is the change in rate of drainage basin erosion with time and increasing offset.